Door bolt



Dec. 22, 192 1,566,805

B. AC KERMAN DOOR BOLT Filed May 11, 1925 WITNESSES INVENTOR jerizazz/fi/ranzz 11 BY a;

ATTORNEYS Patented Dec. 22, 1925.

UNITED STATES BERNARD ACKERMAN, OF NEW YORK, N. Y.

DOOR BOLT.

Application filed May 11, 1925.

To all whom it may concern:

Be it known that I, BERNARD ACKERMAN, a citizen of the United States of America, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Door Bolt, or which the fol-' lowing is a description.

My invention relates to a door bolt and particularly to a door bolt adapted to be carried by the door and to engage the floor in a way to positively prevent the opening of the door or even limited movement there of.

The general object of my invention is to provide a door bolt of the indicated character which may be conveniently. manipulated to dispose it in an upstanding position on the door to be carried by the latter or to an oblique position in firm engagement with the floor and the door.

More specifically, the invention has for its object to provide a bolt of the indicated type possessing the maximum strength and embodying few elements of simple form.

Reference is to be had to the accompanying drawings forming a part of this specification, it being understood that the drawings are merely illustrative of one example of the invention.

Figure 1 is a view partly in section and partly in side elevation of a door bolt embodying my invention showing the same atfixed to the door, the dotted lines indicating the locking position of the bolt;

Figure 2 is a front elevation of my improved door bolt, with the floor socket in vertical section, the section as indicated by the line 22 in Figure 1;

Figure 3 is a partly sectional side elevation showing a fragment of the bolt and door in the locking position;

Figure 4: is a horizontal section on the line 4l-4, Figure 1.

In carrying out my invention in accordance with the illustrated example I provide a bolt composed of telescoping sections, the one section 10 being externally threaded and engaging internal threads 111 in the other section 11. At the opposite end from the section 10 the section 11 has a plug 12 closing the same and said plug being formed with a rounded end and having a threaded shank 112 engaging the internal threads 111. At the end of the threaded section 10 a terminal 13 is formed which in practice is Serial No. 29,554.

made flat to better engage the floor socket 21 hereinafter referred to, said terminal 13 having at the end thereof at one side a beveled surface 14 to contact with and lie parallel with the bottom or the floor socket 24.

The bolt section 11 is turnablc and slidable in a collar 15 having trunnions 16 rockable in arms 17 on a bracket 18 adapted to be secured by any suitable fasteners to the door A.

On the bracket 18 or otherwise rigidly secured to the door is a bolt holder adapted to receive the plu 12 of the bolt when the latter is in uprig t position alongside the door as in Figures 1 and 2. The plug 12 has studs 20 at diametrically opposite sides adapted by a vertical movement of the bolt to engage the bevelled cam surfaces at the upper end of flange 23 on the bolt holder 19. The socket 24 has a bevelled under-cut indicated at 25, Figure 1, so that when the bevelled surface 1 1 of the bolt terminal 13 rests at the bottom of the socket 24 the op posite side edge of the terminal 13 will lie against and be parallel with the undercut bevel 25.

With a bolt embodying my invention such as shown for example in the drawing, the bolt normally will be carried by the door A and will be disposed in the upright position with the studs 20 resting in recesses 21 between the bevels 22 so that the holder 19 will thus sustain the bolt. When the door is to be locked the bolt is lifted out of engagement with the holder 19 by vertically sliding the section 11 in the collar 15 until the plug 12 clears the flange 23. The bolt may now be rocked to the dotted line position of Figure 1 which will dispose a plug 12 at the upper end and the terminal 13 in the socket 524:; the tubular section 11 is now turned to cause the telescoping section 10 to move downwardly thereby increasing the total effective length of the bolt. At this time the plug 12 is pressed firmly in a recess 26 at the under side of the abutment 27 on the base or bracket plate 18. When the door is to be released, the section 11 is reversely turned on the section 10 so that the latter is moved partly into the section 11, thereby reducing the total eflective length of the bolt and permitting the terminal 13 to swing out of the socket 24 after which the bolt is swung vertically on the bracket arms 17 from the dotted line position to the upright position and then permitted to gravitationally dropjthrough the collar until the studs engage the holder 19 at member being adapted to receive the contact of oneor other of the studs20 when 'the bolt has been shortened sufiiciently 'for said studs 20 to reach the plane of the member'28 It Will be noted from the dotted line -posi- 'tion of the bolt as indicated in Figure 1 that the upper and loWer ends of the bolt in the locking position exert a thrustagainstsun' faces 1n parallel planes. Tl1us, tl1eax1s of 'thebolt is perpendicular to the thrust receiving surfaces in the socket 24: and "abutment 26. e I I would state furthermore thatwvhile the i'llustratedfexample constitutes a practical embodiment offiny invention, 1 donot limit myself *strictly to "the exact details herein illustrated,v since, manifestly," the same can be considerably varied Withoiit departure from the spirit of {the invention as defined inthe appended claims: 1:

Having thusdescribed my"invention, I

claim w A-jdoor bolt including telescoping b'o-lt sectionsjhaving threaded engagement With i "each other, an element in Whichone of said sections 'hasl turning-and slid ng movement,

ineansto*roclfab'ly mount said element on a door topermit the bolt sections to-move to an approximately upright'po'sition adjacent thedooii-or tofbblique' position for engagem'ent with a floor "adjacent the door bolt holding means, means to sustain-said bolt holding means on the door. it v 2. 'Audoor bolt including'telescoping bolt sections lias'fturning' and sliding movement,

means to'rockably mount'said element one;

door to permit the bolt sections to move to sections, an element in which one of' said an approximately upright position adjacent the door or to oblique position for-engage ment With a floor adjacent the door boltholding means, and means to sustain "said bolt-holding means 'on-the door.

3. A device of the classdescribed includ ing a bolt formed in telescoping sections to vary the total effective lengthjof theibolt, and'means to turnably and rockably hold said bolt on the doorto permit the boltto assume a position alongside :the door or an oblique position to engage a floor; together with a bolt-sustainingmeans afi'o1'ding=support forsaid boltiat the-lower end vvhen the oolt is in the first position,"

4. A door bolt including an externally threaded bolt section, an iiiternally threaded bolt section engaged byixthe first section, at i collar in which the second-section is .slidable and turnable, and meansfito support said collar 'on a door; together 'x'vithfa holder adapted to be-carried by the door and at l fording a rest for the lowerend of the bolt, said holder having a flange formed With recesses :as Well as With bevelled surfaces above the recesses, and studs on the bolt adapted to be accommodated'in said rece'sses,.-

said collar having a member adapted to be engaged by said studs withthe relative turning of the bolt sections ina direction to shorten the total length'of thebolt.

BERNARD iACKERM-Aihh 

